Noah and Lucas Aldrich are inseparable brothers. Lucas was born with the brain disorder lissencephaly, which affects his growth and development. Lucas does not walk or talk, but thanks to his parents and brother, he gets to do a lot of things able-bodied kids do. Eight-year-old Noah recently entered a youth triathlon, and he took Lucas along. He pulled him on a bicycle, towed him while swimming, and pushed him while running. Sing it with me now: “He ain’t heavy, he’s my brother.” See more pictures of Noah and Lucas at Buzzfeed.